The Busch brothers fought door-to-door as Kurt finally fought off his younger brother Kyle to capture the checkered flag at the Quaker State 400 on July 13 at the Kentucky Speedway in Sparta. It was Kurt’s first win of the season and his first win at Kentucky. Bubba Wallace’s spin-out on lap 261 of a scheduled 267 brought out the seventh caution flag of the race and set up the sibling rivalry of the final lap. While Kyle was able to jump cleanly into the lead on the restart, Kurt had to fight past Erik Jones before he had the opportunity to give chase. It took all 1.5 miles of the final lap, but as the cars headed into the final stretch Kurt found room on the outside and slipped into the lead and held on for the narrowest victory in Kentucky Speedway history at .076 seconds. It was the first time in three career 1-2 battles that he had crossed the finish line ahead of his brother.